Close electric field changes associated with upward-initiated lightning at the Gaisberg Tower

Helin Zhou, G. Diendorfer, R. Thottappillil, H. Pichler, M. Mair
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引用次数: 5

Abstract

We examine in detail the simultaneous lightning current waveforms, close electric field changes, and lighting location system data for upward lightning discharges initiated from the Gaisberg Tower (GBT) from 2005 to 2009. Out of 205 upward flashes, we find that most of upward flashes (179/205 or 87%) are initiated at the tower top without any nearby preceding discharge activity, 26 flashes (13%) are initiated by nearby triggering lightning discharges, including 10 positive cloud-to-ground lightning, 1 negative cloud-to-ground lightning, and 15 cloud discharges. The possible reasons for self-triggered upward flashes dominating at the GBT would be the field enhancement due to the Gaisberg Mountain above 800 m of the surrounding terrain of the city of Salzburg and low cloud base during cold season.
盖斯伯格塔上与向上发起的闪电有关的闭合电场变化
本文详细分析了2005 - 2009年盖斯伯格塔(GBT)向上闪电放电的同步雷电电流波形、近场变化和照明定位系统数据。在205次向上闪电中,我们发现大多数向上闪电(179/205或87%)是在塔顶触发的,没有任何附近的放电活动,26次(13%)是由附近触发的闪电放电触发的,包括10次云对地正闪电,1次云对地负闪电和15次云放电。自触发向上闪光在GBT占主导地位的可能原因是萨尔茨堡市周围地形800米以上的Gaisberg山和寒冷季节低云基础导致的场增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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